Aerosol-generating device with sensing and airflow control
By incorporating an induction heating component and an adjustable air inlet, the design addresses the issue of insufficient operational adaptability in aerosol generation devices, enabling flexible adjustment of airflow and heating zones, thereby improving the stability of aerosol generation and enhancing the user experience.
Patent Information
- Application Number
- CN202480016774.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-03-15
- Filing Date
- 2024-03-11
- Publication Date
- 2025-10-24
AI Technical Summary
Existing aerosol generation devices have shortcomings in terms of operational adaptability, ambient air intake, and adaptability to heating the aerosol formation matrix.
The system employs an induction heating assembly, including an induction coil and sliding electrical contacts, combined with an inlet cover for an adjustable air inlet. Partial activation of the induction coil and regulation of the airflow are achieved through an actuation element, ensuring variability in airflow and heating zone.
Improved operational adaptability of the aerosol generation device has been achieved, ensuring satisfactory aerosol generation even as the aerosol forming matrix is gradually depleted, and providing a better user experience by gradually increasing the heating zone and airflow entry.
Smart Images
Figure CN120835759A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present invention relates to an aerosol-generating device. BACKGROUND
[0002] It is known to provide an aerosol-generating device for generating an inhalable vapour. Such devices can heat an aerosol-forming substrate to a temperature at which one or more components of the aerosol-forming substrate volatilise without combusting the aerosol-forming substrate. The aerosol-forming substrate can be provided as part of an aerosol-generating article. The aerosol-generating article can have a rod shape for insertion into a cavity, such as a heating chamber, of the aerosol-generating device. An induction coil can be arranged in or around the heating chamber for heating the aerosol-forming substrate once the aerosol-generating article is inserted into the heating chamber of the aerosol-generating device. SUMMARY
[0003] It is desirable to have an aerosol-generating device with improved operational adaptability. It is desirable to have an aerosol-generating device with improved adaptability of ambient air intake. It is desirable to have an aerosol-generating device with improved adaptability of heating portions of an aerosol-forming substrate.
[0004] According to embodiments of the present invention, an aerosol-generating device can be provided that can include an induction heating assembly. The induction heating assembly can include an induction coil and at least one electrical contact arranged to slidingly contact the induction coil. The aerosol-generating device can further include an air inlet that can be configured to allow ambient air to be drawn into the aerosol-generating device. The aerosol-generating device can further include an inlet cover that can be configured to adjust a cross-sectional area of the air inlet. The aerosol-generating device can further include an actuation element. The actuation element can be mechanically connected to the electrical contact and the inlet cover. The actuation element can be configured to, upon actuation, slide the contact along the induction coil and actuate the inlet cover so as to adjust the cross-sectional area of the air inlet.
[0005] According to embodiments of the present invention, an aerosol-generating device is provided that includes an induction heating assembly. The induction heating assembly includes an induction coil and at least one electrical contact arranged to slidingly contact the induction coil. The aerosol-generating device further includes an air inlet configured to allow ambient air to be drawn into the aerosol-generating device. The aerosol-generating device further includes an inlet cover configured to adjust a cross-sectional area of the air inlet. The aerosol-generating device further includes an actuation element. The actuation element is mechanically connected to the electrical contact and the inlet cover. The actuation element is configured to, upon actuation, slide the contact along the induction coil and actuate the inlet cover so as to adjust the cross-sectional area of the air inlet.
[0006] Providing an electrical contact that is slidable along the induction coil enables partial activation of the induction coil. Partial activation of the induction coil enables the generation of a variable size of a heating zone within the induction coil. Exemplarily, the electrical contact can be slidable along the induction coil during operation of the aerosol-generating device or between individual portions of use to heat more aerosol-forming substrate over time. Thus, fresh aerosol-forming substrate is heated during each puff of a user. Thus, the length of the heating zone can be gradually increased by sliding the slidable contact along the induction coil.
[0007] By providing an inlet cap that is configured to adjust the cross-sectional area of the air inlet, the airflow allowed into the aerosol-generating device can be adjusted. In particular, during use of the aerosol-generating device, the aerosol-forming substrate of the aerosol-generating article is gradually depleted. Thus, it can be desirable to increase the airflow through the aerosol-generating article to maintain the amount of entrained vaporized aerosol-forming substrate and thus a satisfactory aerosol generation.
[0008] The combination of sliding the slidable contact along the induction coil and gradually increasing the cross-sectional shape of the air inlet can be particularly beneficial. The sliding of the slidable contact along the induction coil gradually increases the heating zone of the induction coil and thereby gradually heats more aerosol-forming substrate. At the same time, the gradual increase of the cross-sectional shape of the air inlet allows additional airflow into the aerosol-generating device, thereby maintaining a satisfactory aerosol generation.
[0009] The actuation element can be configured to slide the slidable contact in the proximal direction. The actuation element can be configured to increase the heating zone of the induction coil during the sliding of the slidable contact in the proximal direction.
[0010] The actuation element can be configured to slide the inlet cap in the proximal direction. The actuation element can be configured to increase the cross-sectional shape of the air inlet during the sliding of the inlet cap in the proximal direction.
[0011] The inlet cap can be arranged on an outer periphery of the aerosol-generating device. A guiding element, preferably a guiding groove or a guiding protrusion, can be provided on the outer periphery of the aerosol-generating device for facilitating a guided movement of the inlet cap. The guiding element can be arranged parallel to a longitudinal center axis of the aerosol-generating device.
[0012] The inlet cap can comprise a cap guide. The cap guide can be configured to be mounted at the guiding element such that a sliding movement of the inlet cap relative to the guiding element is enabled. Exemplarily, the guiding element can comprise a groove and the cap guide can comprise a protrusion that is slidably arranged within the groove.
[0013] The induction coil can comprise a second electrical contact, which can be fixedly connected with the induction coil.
[0014] The slidable contact can also be denoted as a first electrical contact or as a first slidable electrical contact. The second electrical contact can also be denoted as a second fixed electrical contact. One or both of the first slidable electrical contact and the second fixed electrical contact can be connected with a power source of the aerosol-generating device.
[0015] The inlet cover can be configured slidable over the air inlet to adjust a cross-sectional area of the air inlet.
[0016] The inlet cover can have a circular shape. The air inlet can have a circular cross-sectional shape. An outer diameter of the inlet cover can correspond to or can be larger than an inner diameter of the air inlet. In other words, the size of the inlet cover can be set to be able to cover the air inlet, thereby reducing or preventing the airflow from entering into the air inlet. The airflow can be gradually enabled to enter into the air inlet during the sliding movement of the inlet cover by means of the actuation element. The gradual enabling of the airflow to enter into the air inlet can be facilitated by the inlet cover gradually exposing the air inlet during the sliding movement of the inlet cover.
[0017] The inlet cover and the air inlet can have alternative shapes. For example, the inlet cover can have an oval, elliptical or rectangular shape. The air inlet can have a corresponding oval, elliptical or rectangular cross-sectional shape.
[0018] The inlet cover can be arranged at a periphery of the aerosol-generating device.
[0019] The actuation element can be configured as a sliding button. The actuation element can be configured to be actuated by a user, more preferably by a finger of a user.
[0020] The actuation element can be configured as an electrical actuation element. In this embodiment, the actuation element can be arranged within the aerosol-generating device. In other words, the actuation element can be protected from external influences by the housing of the aerosol-generating device, as no manual activation of the actuation element is required in this embodiment.
[0021] The aerosol-generating device can further comprise a controller. The controller can be configured to control the sliding movement of the electrical actuation element based on a usage profile of the aerosol-generating device.
[0022] The controller can control the actuation element to slide the first contact in the proximal direction during operation of the aerosol-generating device. The controller can control the actuation element to slide the inlet cover in the proximal direction during operation of the aerosol-generating device. Preferably, the controller controls the actuation element to simultaneously slide the first contact and slide the inlet cover in the proximal direction, respectively.
[0023] The controller can also be configured to control the supply of electrical energy from the power source to one or both of the first electrical contact and the second electrical contact.
[0024] The aerosol-generating device can further comprise a motor. The motor can be configured as an electric linear motor. The motor can be configured to slideably move the electrically actuated element. The controller can control operation of the motor. The controller can be configured to control supply of electrical energy from the power source to the motor to power the motor.
[0025] The actuation element can be arranged at a periphery of the aerosol-generating device.
[0026] The aerosol-generating device can further comprise a cavity configured for receiving an aerosol-generating article which can comprise an aerosol-forming substrate.
[0027] The induction coil can be arranged at least partially around the cavity.
[0028] The aerosol-generating device can further comprise a power source, preferably a battery, for powering the induction coil.
[0029] The present application also relates to an aerosol-generating system comprising an aerosol-generating device as described herein and an aerosol-generating article comprising an aerosol-forming substrate.
[0030] The aerosol-generating article can comprise a susceptor which can be configured to be heated by an alternating magnetic field generated by the induction coil of the aerosol-generating device.
[0031] The present application also relates to a method for operating an aerosol-generating device as described herein. The method can comprise the steps of:
[0032] sliding the electrical contact along the induction coil by the actuation element, and
[0033] simultaneously actuating the inlet cap by the actuation element to adjust the cross-sectional area of the air inlet.
[0034] As used herein, the terms “proximal”, “distal”, “upstream” and “downstream” are used to describe the relative position of components or parts of components of the aerosol-generating device relative to the direction in which a user draws on it during use of the aerosol-generating device.
[0035] An aerosol-generating device can comprise a mouth end through which, in use, aerosol exits the aerosol-generating device and is delivered to a user. The mouth end can also be referred to as the proximal end. In use, a user puffs on the proximal or mouth end of the aerosol-generating device in order to inhale aerosol generated by the aerosol-generating device. Alternatively, a user can puff directly on an aerosol-generating article inserted into an opening at the proximal end of the aerosol-generating device. The opening at the proximal end can be an opening of a cavity. The cavity can be configured to receive an aerosol-generating article. The aerosol-generating device comprises a distal end opposite the proximal or mouth end. The proximal or mouth end of the aerosol-generating device can also be referred to as the downstream end, and the distal end of the aerosol-generating device can also be referred to as the upstream end. Components or parts of components of the aerosol-generating device can be described as being upstream or downstream of each other based on their relative position between the proximal, downstream or mouth end and the distal, upstream end of the aerosol-generating device.
[0036] As used herein, an “aerosol-generating device” relates to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate can be part of an aerosol-generating article, for example part of a smoking article. The aerosol-generating device can be a smoking device that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol that is directly inhalable by a user through the user’s mouth into the user’s lungs. The aerosol-generating device can be a holder. The device can be an electrically heated smoking device. The aerosol-generating device can comprise a housing, circuitry, a power source, a heating chamber and an induction coil.
[0037] As used herein with reference to the present application, the term “smoking” as used in relation to a device, article, system, substrate or otherwise does not refer to conventional smoking in which an aerosol-forming substrate is combusted, at least in part. The aerosol-generating device of the present application is arranged to heat an aerosol-forming substrate to a temperature that is below the combustion temperature of the aerosol-forming substrate but at or above a temperature at which one or more volatile compounds of the aerosol-forming substrate are released to form an inhalable aerosol.
[0038] The aerosol-generating device can comprise circuitry. The circuitry can comprise a microprocessor, which can be a programmable microprocessor. The microprocessor can be part of a controller. The circuitry can comprise further electronic components. The circuitry can be configured to regulate the supply of electrical power to the induction coil. The electrical power can be supplied to the induction coil continuously after activation of the aerosol-generating device or can be supplied intermittently, such as on a puff-by-puff basis. The electrical power can be supplied to the induction coil in the form of pulses of electrical current.
[0039] The aerosol-generating device can comprise a power source, typically a battery, within the main body of the aerosol-generating device. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery such as a lithium-cobalt, lithium-iron-phosphate, lithium-titanate, or lithium-polymer battery. As an alternative, the power source can be another form of charge storage device such as a capacitor. The power source can need recharging and can have a capacity that enables sufficient energy to be stored for one or more use experiences; for example, the power source can have sufficient capacity to generate aerosol continuously for a period of approximately six minutes or for a period that is a multiple of six minutes. In another example, the power source can have sufficient capacity to provide a predetermined number of puffs or discrete activations of the induction coil.
[0040] The cavity of the aerosol-generating device can have an open end into which the aerosol-generating article is inserted. The open end can be a proximal end. The cavity can have a closed end opposite the open end. The closed end can be a base of the cavity. The closed end can be closed other than to provide an air hole arranged in the base. The base of the cavity can be flat. The base of the cavity can be circular. The base of the cavity can be arranged upstream of the cavity. The open end can be arranged downstream of the cavity. The cavity can have an elongate extension. The cavity can have a longitudinal central axis. The longitudinal direction can be a direction extending along the longitudinal central axis between the open end and the closed end. The longitudinal central axis of the cavity can be parallel to the longitudinal axis of the aerosol-generating device.
[0041] The cavity can be configured as a heating chamber. The cavity can have a cylindrical shape. The cavity can have a hollow cylindrical shape. The shape of the cavity can correspond to the shape of the aerosol-generating article to be received in the cavity. The cavity can have a circular cross-section. The cavity can have an elliptical or rectangular cross-section. The cavity can have an inner diameter that corresponds to the outer diameter of the aerosol-generating article.
[0042] An airflow passage can pass through the cavity. Ambient air can be drawn into the aerosol-generating device through the airflow passage, into the cavity, and towards the user. Downstream of the cavity, a mouthpiece can be arranged, or the user can draw directly on the aerosol-generating article. The airflow passage can extend through the mouthpiece.
[0043] Generally, a susceptor is a material that is able to generate heat when penetrated by an alternating magnetic field generated by an induction coil. When located in an alternating magnetic field, if the susceptor is electrically conductive, eddy currents are typically induced by the alternating magnetic field. If the susceptor is magnetic, another effect that typically contributes to heating is commonly referred to as magnetic hysteresis loss. Magnetic hysteresis loss occurs primarily due to the movement of magnetic domain blocks within the susceptor, as the magnetic orientation of these magnetic domain blocks will align with the alternating magnetic induction field. Another effect that contributes to magnetic hysteresis loss is when magnetic domains will grow or shrink within the susceptor. Typically, all of these changes in the susceptor that occur at the nanometer scale or below are referred to as "magnetic hysteresis loss" as they generate heat in the susceptor. Thus, if the susceptor is both magnetic and electrically conductive, both magnetic hysteresis loss and eddy current generation will contribute to the heating of the susceptor. If the susceptor is magnetic, but not electrically conductive, then magnetic hysteresis loss will be the only means of heating the susceptor when penetrated by an alternating magnetic field. According to the present invention, the susceptor can be electrically conductive or magnetic, or both electrically conductive and magnetic. An alternating magnetic field generated by one or several induction coils heats the susceptor, which then transfers heat to the aerosol-forming substrate, such that an aerosol is formed. Heat transfer can be primarily through thermal conduction. This heat transfer is optimal if the susceptor is in intimate thermal contact with the aerosol-forming substrate.
[0044] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate capable of releasing volatile compounds that can form an aerosol. For example, the aerosol-generating article can be a smoking article that generates an aerosol that is directly inhaled by a user's mouth into the user's lungs. The aerosol-generating article can be disposable.
[0045] As used herein, the term "aerosol-forming substrate" relates to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate. The aerosol-forming substrate can suitably be part of an aerosol-generating article or a smoking article.
[0046] The aerosol-forming substrate can be a solid aerosol-forming substrate. The aerosol-forming substrate can comprise both a solid component and a liquid component. The aerosol-forming substrate can comprise a tobacco-containing material containing volatile tobacco flavour compounds that are released from the substrate upon heating. The aerosol-forming substrate can comprise a non-tobacco material. The aerosol-forming substrate can comprise an aerosol former that contributes to the formation of a dense and stable aerosol. Examples of suitable aerosol formers are glycerol and propylene glycol.
[0047] The aerosol generating substrate preferably comprises: homogenised tobacco material, an aerosol former and water. Providing homogenised tobacco material can improve the aerosol generation, nicotine content and flavour characteristics of the aerosol generated during heating of the aerosol generating article. In particular, the process of manufacturing homogenised tobacco involves grinding tobacco leaves which more effectively achieves the release of nicotine and flavour upon heating.
[0048] Features described in relation to one embodiment can equally apply to other embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS
[0049] The application will be further described, by way of example only, with reference to the accompanying drawings in which:
[0050] Figures 1A-1E An example aerosol generating device is shown,
[0051] Figures 2A-2D Further illustrations of aerosol generating devices are shown,
[0052] Figures 3A-3C Embodiments of aerosol generating devices with airflow control are shown, and
[0053] Figure 4A And 4B Alternative embodiments of aerosol generating devices are shown. DETAILED DESCRIPTION
[0054] Figure 1A An aerosol generating device 10 is shown having a cavity 12 configured for receiving an aerosol generating article 14 comprising an aerosol generating substrate. The aerosol generating device 10 comprises an induction coil 16 arranged around a portion of the cavity 12. The cavity 12 is configured as a heating chamber. The induction coil 16 is configured to inductively heat a susceptor 18. The susceptor 18 can be part of the aerosol generating article 14 or can be arranged inside the induction coil 16 as part of the aerosol generating device 10.
[0055] Figure 1B How the aerosol generating article 14 can be inserted into the cavity 12 of the aerosol generating device 10 is shown. Additionally, Figure 1B The susceptor 18 is shown preferably arranged in the aerosol generating article 14. In this case, the susceptor 18 is preferably embedded in the aerosol generating substrate so as to heat the aerosol generating substrate when subjected to an alternating magnetic field from the induction coil 16. The susceptor 18 can have a length corresponding to the length of the induction coil 16. The length of the susceptor 18 can be measured along a longitudinal axis of the aerosol generating article 14. The length of the induction coil 16 can be measured along a longitudinal axis of the aerosol generating device 10. The susceptor 18 can be flat. The susceptor 18 can be rectangular.
[0056] Figure 1B A first electrical contact and a second electrical contact are also shown. The first electrical contact is configured to be slidable along the induction coil 16. The second electrical contact is stationary. This enables a partial activation of the induction coil 16 by sliding the first contact 20 along the induction coil 16, as shown in Figures 1C to 1E In these figures, the first contact 20 is gradually slid along the induction coil 16, thereby gradually activating larger portions of the induction coil 16. As a result, a gradually increasing heating zone is created inside the induction coil 16. As shown in Figures 1C to 1E Correspondingly larger portions of the susceptor 18 are heated. This in turn means that more aerosol-forming substrate from the aerosol-generating article 14 is gradually heated when sliding the first contact 20 along the induction coil 16.
[0057] Figure 2A An aerosol-generating article 14 surrounded by the induction coil 16 is shown. The first contact 20 is arranged to connect the induction coil 16 close to the second contact 22. Figure 2B A corresponding configuration of the aerosol-generating article 14 inserted into the cavity 12 of the aerosol-generating device 10 is shown. In this embodiment, the sliding of the first contact 20 is facilitated by an actuation element 24. The actuation element 24 is exemplarily depicted as a sliding button on the periphery of the aerosol-generating device 10. In Figure 2C and 2D The same elements are depicted. However, the actuation element 24 is actuated, more specifically slid parallel to the longitudinal axis of the aerosol-generating device 10, to slide the first contact 20 along the induction coil 16. As a result, a larger heating zone is created within the induction coil 16 and a larger portion of the susceptor 18 of the aerosol-generating article 14 is heated.
[0058] Figure 3 shows a preferred embodiment of the present application. In this embodiment, the actuation element 24 has a dual function. In addition to the previously described function of the actuation element 24 to slide the first contact 20 along the induction coil 16, the actuation element 24 also slides the inlet cover 26 relative to the air inlet 28. The actuation element 24 is preferably integrally formed with the inlet cover 26, such that a sliding movement of the actuation element 24 results in a sliding movement of the inlet cover 26.
[0059] The air inlet 28 is in fluid connection with the cavity 12. During operation, a user’s puff on the aerosol-generating article 14 draws ambient air through the air inlet 28 into the cavity 12 and further through the aerosol-forming substrate of the aerosol-generating article 14. The inlet cover 26 is arranged to gradually slide over the air inlet 28. In other words, the cross-sectional surface of the air inlet 28 can be adjusted by a sliding movement of the air inlet 28.
[0060] In Figure 3AIn the middle, the first contact is arranged near the second contact 22. This is preferably an arrangement before the user experience has started. In this case, the air inlet 28 is completely covered to prevent ambient air from flowing into the air inlet 28. In Figure 3B In the middle, the user experience has started. The sliding movement of the actuation element has moved the first contact 20 in the proximal direction along the induction coil 16, thereby increasing the portion of the induction coil 16 that is actuated. At the same time, the sliding movement of the actuation element 24 has also partially exposed the air inlet 28 by sliding the inlet cover 26 in the proximal direction. Finally, the air inlet 28 is completely exposed in Figure 3C In the middle, the user experience has started. The sliding movement of the actuation element has moved the first contact 20 in the proximal direction along the induction coil 16, thereby increasing the portion of the induction coil 16 that is actuated. At the same time, the sliding movement of the actuation element 24 has also partially exposed the air inlet 28 by sliding the inlet cover 26 in the proximal direction. Finally, the air inlet 28 is completely exposed in
[0061] Figure 4A An alternative embodiment is shown in which the third contact 30 is not provided as a sliding contact. Rather, the third contact 30 is provided as a fixed contact. In addition, a plurality of fourth contacts 32 is provided. All fourth contacts 32 are also fixed contacts. In order to activate different portions of the induction coil 16, the actuation element 24 is configured to connect any one of the third contact 30 and the fourth contacts 32 with the power supply of the aerosol-generating device 10. In Figure 4B An alternative is shown in the middle in which the plurality of fourth contacts 32 can be positive or negative contacts, such that the connection is not limited to a combination of the third contact 30 and any one of the fourth contacts 32. Rather, any desired contact combination can be selected to, for example, activate only a middle portion of the induction coil 16 or to heat subsequent segments of the induction coil 16. Figure 4A and 4B The embodiments of the aerosol-generating device 10 are preferably combined with a simultaneous adjustment of the inlet cover 26 as required. For example, during the user experience, it can be allowed to let more and more air into the aerosol-generating device 10 by gradually exposing the air inlet 28 by means of the actuation element 24.
Claims
1. An aerosol-generating device comprising: an induction heating assembly comprising an induction coil and at least one electrical contact arranged to slidingly contact the induction coil, an air inlet configured to allow ambient air to be drawn into the aerosol-generating device, an inlet cap configured to adjust a cross-sectional area of the air inlet, and an actuation element, wherein the actuation element is mechanically connected to the electrical contact and the inlet cap, and wherein the actuation element is configured to, upon actuation, slide the contact along the induction coil and actuate the inlet cap so as to adjust the cross-sectional area of the air inlet.
2. The aerosol-generating device according to claim 1, wherein the induction coil comprises a second electrical contact fixedly connected with the induction coil.
3. The aerosol-generating device according to any one of the preceding claims, wherein the inlet cap is configured to be slidable over the air inlet to adjust the cross-sectional area of the air inlet.
4. The aerosol-generating device according to any one of the preceding claims, wherein the inlet cap is arranged at a periphery of the aerosol-generating device.
5. The aerosol-generating device according to any one of the preceding claims, wherein the actuation element is configured as a sliding button.
6. The aerosol-generating device according to any one of claims 1 to 4, wherein the actuation element is configured as an electrically actuated element.
7. The aerosol-generating device according to claim 6, wherein the aerosol-generating device further comprises a controller, and wherein the controller is configured to control a sliding movement of the electrically actuated element based on a usage profile of the aerosol-generating device.
8. The aerosol-generating device according to claim 6 or 7, wherein the aerosol-generating device further comprises a motor, preferably an electric linear motor, and wherein the motor is configured to slidingly move the electrically actuated element.
9. The aerosol-generating device according to any one of the preceding claims, wherein the actuation element is arranged at a periphery of the aerosol-generating device.
10. The aerosol-generating device according to any one of the preceding claims, wherein the aerosol-generating device further comprises a cavity configured for receiving an aerosol-generating article comprising an aerosol-forming substrate.
11. The aerosol-generating device according to claim 10, wherein the induction coil is arranged at least partially around the cavity.
12. The aerosol-generating device according to any one of the preceding claims, wherein the aerosol-generating device further comprises a power source, preferably a battery, for powering the induction coil.
13. An aerosol-generating system comprising an aerosol-generating device according to any one of the preceding claims and an aerosol-generating article comprising an aerosol-forming substrate.
14. An aerosol-generating system according to claim 13, wherein the aerosol-generating article comprises a susceptor configured to be heated by the alternating magnetic field generated by the induction coil of the aerosol-generating device.
15. A method for operating an aerosol generating device according to any one of claims 1 to 12, wherein the method comprises the steps of: - sliding the electrical contact along the induction coil by the actuating element, and - Simultaneous actuation of the inlet covers by the actuating elements to adjust the cross-sectional area of the air inlet.